wwan auto drops after few mins

hi all,
I'm having this problem. I downloaded and installed the GlobeTrotter Connect in order to use 3g/HSPA on my z11wn. I could make may lap connect to internet via the inserted sim. However, the connection only last for few mins, then drops. The only way to make it works again is turn off wwan, turn on and restart GlobeTrotter Connect, sometimes I need to restart lap aswel.
this is very annoyed, because I can use mobile internet for only few mins, then must shut down and reset the WWAN adapter.
Any one can help please.
much appreciated.

 

i have problems with globetrotter 2.3 in way that after some time my computer became slow. i have vaio tz with wwan. slow in way that some activity like alt-f7 in total commander (search option) need 10 sec to appear (normaly imidiately). and some other symptomps as well. All back to normal ater restart Globetrotter connect. Now i finnaly find way and dial over (windows xp) dial-up. I set number to call *99# and it connect using my wwan card as modem. Now work flawless. Meaby this help ...
can you help where to download globetrotter, as a didn't manage to do that on site

 

this is the one I'm using , GT 3.2, just upload it because dont remember the link where i downloaded it.
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different between 3.2 and 2.3 is 3.2 supports sms function. however, the driver comes with 3.2 is not working property. so i suggest install GT 3.2, then reinstall driver for wwan card with xp driver or 2.3 driver. just use the GT connection 3.2 only. this is my experience because 3.2 will auto disc after from 30s to 10mins

 

The link is Globetrotter 3.1 not 3.2. You can download it here. You just need to enter the IMEI in the bottom of your PC:
Software download | Option