Birmingham manager Lee Clark has heaped praise on full-back Paul Caddis.
The 24-year-old captained Swindon to the League Two title last season, but joined the Blues on loan following a public row with Paolo Di Canio.
Caddis dislocated his shoulder in only his third match for Clark's men, but has now started the last two games for the Championship club as they plot a route up the table.
Clark said: "Paul's vital to what I'm trying to achieve because he's got the DNA of the type of footballers I like to work with.
"He's got fantastic enthusiasm and he's very low maintenance around the football club.
"He's got great desire, he's technically very good and he's consistent.
"Paul is young and hungry and he's loving this opportunity to be at such a massive club in the Championship. He doesn't want to give it up without a fight and he actually wants to progress even further and go on to the next level.
"That's the type of DNA I want from players that represent the football club."
Rosler made six changes to his starting line-up for the southern section quarter-final clash at Roots Hall and he was pleased with the performance, if not the result.
"I am extremely proud of the team I put out," said Rosler.
"With the injuries we currently have, I was happy with the way we started passing the ball and we were very unlucky with the first goal taking a big deflection.
"For the second goal I don't think Kevan Hurst will ever do that again.
"We had three or four big chances before we got the goal back in the second half but overall I cannot fault the players I had on the pitch. We played very well and it is just a testament of the form we are currently in even though we didn't pick up the result we wanted."
Rangers are seven points adrift of safety after 15 matches and are still searching for their first win of the campaign, despite spending heavily during the summer.
It is understood that the decision to shelve plans for the traditional end-of-year party was made by the players.
New manager Harry Redknapp, who replaced the sacked Mark Hughes last month, oversees his third match in charge at Wigan on Saturday.
