unable to access hotmail,microsoft and yahoo websites with UTStarcom WA3002G1 modem

hai, i am having UTStarcom WA3002G1 modem and i am unable to access microsoft websites, MSN, Yahoo, Hotmail websites while i am able to access gmail and other sites. can anyone help me please as i visited BSNL office too and the staff said since i can access google their job is done and they cannot do any further. so please help me.

CHANGING MUT TO 1420 worked ; cheers (Y) ; i changed mut both in modem config and tcp 😉and speed has also increased to some extent