Hi all, i met a problem while i trying hyperterminal to connect to GPRS.

Since long time i searching on internet but nvr get a result of step to follow for setting and connecting to GPRS using a GSM/GPRS modem. my problem is
at+cgdcont=2,"IP","net" 'where "net" is APN of my service provider
--> ok
at+cgqreq=2,0,0,0,0 'where the value is i got from log file of my phone(Motorola E680i) while i using it connect to GPRS
--> ok
at+cgqmin=2,0,0,0,0 'where the value is also from my phone
--> ok
at+cgatt=1
--> ok
at+cgact=1,2
--> +CME ERROR: unspecified GPRS error

after saw this line. all my heart broken... half yr i looking source of this tech but... so i still dun know what is the exact step to connect.. cos what i want to do is connecting to GPRS, then send and receive file from my FTP site by using VB6. the file is mostly under 100k text file... but fail.. my boss already loss patient on this matter at the moment.. so hope all guys and expert can give me a great great help.... thanks is advance!!!!! who i always saw his name is freitasm. i really hope someone can save me...