Airtel Postpaid — Airtel GPRS problem

Sir / Madam,
My airtel mobile no is [protected] and i have activated a GPRS 199 Plan on it. I am having three problems :-

1) I got a sms for confirmation of GPRS activated on my mobile, but which plan got activated, no confirmation for that. please confirm me.

2) When i connect my phone to my PC for browsing internet, it was not working. After contacting customer care 12118, the person told me to go to (on my PC) Control Panel -> Phone & Modem Options -> Modems -> Advanced to delete an Extra intializing command (+CGDCONT=.."airtelgprs.com"), than it starts working.
But, the problem is whenever i connect net from my PC via phone, it works for 5-10 mins than it shows some error (WIN32 Generic Host Problem) and stops working. it remains connected but no site opened. when i delete the same command (discussed as above), it starts working but after some time again same problem arises. pl do tell me what is the actual problem and what is the solution.

3) whenever i use airtel GPRS the sent data is always around 5-7 times the recieved data, whereas i am not uploading anything on the net, i.e., just browsing the sites. I have used BSNL GPRS in the past and still using MTNL GPRS on the same PC, they just works fine, there i face none of these problems. Pl tell me the exact problem.

Sachin Singh
[protected]