IrDa problem with tungsten E2

Hi,
I have an application that prints OK on TX and tungsten C, using a
IRDA printer.

But now, with the Tungsten E2 it doesn't work.
I don't receive any errors, it just doesn't print anything...

I use the serial manager for communication, and target a 68k
processor.

I noted that E2 use Garnet 5.4.7 OS, but the TX use 5.4.9.

Code:
//open
SrmOpen(ser****tIr****t, 9600, &(srm****tID));
....
//
SrmSend(srm****tID, Line, LineSize, &err);
....
//close

Any ideas?