Scunthorpe United 0 Birmingham City 2
Birmingham eased into the second round after Mikael Forssell's first goals for the club since April 2004 was enough to see off a spirited Scunthorpe outfit.
Forssell produced a clinical finish after 15 minutes to give Birmingham valuable breathing space and then rapped home a penalty with 20 minutes remaining to seal the victory.
It was a relatively comfortable victory for Steve Bruce's men, but their injury curse struck once again as the hapless Muzzy Izzet was substituted after 26 minutes with an Achilles injury.
It is not yet known how serious the damage is but Bruce admitted that he is a major doubt for the visit of Liverpool on Saturday.
However, the positives far outweighed the negatives on an evening where Bruce handed out three debuts to his young pool of talent.
Neil Kilkenny, Marcos Painter and Peter Till all emerged with credit and they may be needed soon if Bruce's injury crisis continues. The manager is now likely to be without an incredible seven midfielders for Saturday
"Muzzy has an Achilles problem and while I don't know how serious it is yet, he is unlikely to play on Saturday," said Bruce.
"I have only got Damien Johnson fit for the weekend and I think I must have run over a black cat."
One of Bruce's absentees will be Nicky Butt, who was serving the first of a three-game ban after his red-card at Portsmouth on Saturday.
Butt is also facing an FA charge of "abusive and/or insulting comments to match officials," which could lead to a further three-match ban as well as a heavy fine.
Birmingham have been granted an extension to their appeal time and have until 6pm tonight to launch an appeal and Bruce revealed that was an avenue they are likely to be pursuing.
However, matters on the pitch were far more satisfactory for Bruce, as he saw his side maintain their unbeaten start to the season on the road.
Scunthorpe started brightly but the first real chance of note fell to Forssell after 13 minutes.
A hurried clearance from Cliff Byrne only reached Damien Johnson and he played a sharp first-time pass into Forssell.
The Finnish striker has struggled this season, but looked sharp as he swivelled and drove a shot goalwards that took a big deflection to leave Paul Musselwhite scrambling across his area.
The goalkeeper parried it onto his far post and Nathan Stanton tidied up as Walter Pandiani lurked with intent.
However, it only delayed the inevitable as inside two minutes Gray had latched onto another great through ball to leave Cliff Byrne trailing in his wake before delivering another sweet cross into the danger zone.
Scunthorpe's centre-halves failed to clear the ball and it reached Forssell who controlled it on his thigh before unleashing a left-foot halfvolley that Musselwhite could only palm into the roof of the net.
Walter Pandiani headed wide from a Jermaine Pennant cross before Scunthorpe finally tested Birmingham from a free-kick 25 yards from goal Richie Ryan stabbed the ball straight into the wall and drew an unnecessary booking for Pandiani but, from the re taken freekick, the hosts came within a whisker of equalising.
The dangerous Wayne Corden curled the ball towards the top corner only to be denied by a flying save from Nico Vaesen.
It was an impressive save from the tall Belgian keeper, who looked assured. And he needed to be on his mettle after the interval, as Scunthorpe built up a head of steam and tried to harry Birmingham out of their stride.
A Billy Sharp shot was ruled out for offside and Corden should have done better, but he miscued his effort only ten yards from goal and the danger was cleared.
However, just as the home support were warming their vocal chords, Jamie Clapham produced a scintillating piece of skill to seize the initiative once again.
The left-back exchanged passes with Julian Gray and breezed past Andy Crosby, who brought him tumbling to the floor.
Forssell stepped up to despatch the penalty with aplomb, as he sent Musselwhite the wrong way and deflated the hosts.
Birmingham controlled the final passage of play and Bruce was delighted with the contribution of his Finnish international.
"He wouldn't have started as much this season if we hadn't had the problems with Emile Heskey," added Bruce.
"I would liked to have nursed him back a little bit more, but we always knew he could score a goal.
"It was good to see three players make their debuts too, so there were plenty of good points."