Thanks Jerry for your reply....I really appericiate your co-operation.
I have NEC laptop model ((Versa M400)) or ((Versa FM400)) before it was working fine the problem comes after just updated to win xp sp2. I have downloaded the version 3.2 from the NEC website but it does not work. I heard that some 4.2 version is available also which fixes the problem.
The link which you gave is tried by me before 1 week but this is for billionton chip....not worked too......please help me.....thanx a lot....