GSM Center Error 2 ?

hello (sorry for my bad english)...

i want to use the boomarang libery, but first, i want to check, if my HSDPA modem works with this libery. if I switch "ON" in the GSM Center, I get this message:

GSM Center
Error 2 Das System kann die angegebene Datei nicht finden in function: CreateFile.

i dont know ???

can anybody help me !?

thx, sky...

EDIT: i use this modem: HUAWEI E220 HSDPA USB MODEM (virtual COM2)

Check COM port number

it seems (virtual) COM port used by modem is not those defined in GSMCenter or COM port is already used by different program. Also note COM port having two digit number need prefix ".\". It was discussed in a thread in the past.