windows could not setup adhoc wireless network connection,win7

[27usman]

hi,mery pas emachine E627 laptop hai win7 homepremium,64bit,broadcom802.11g wireless adapter pre installed tha...ma win 7 ma network and sharing centre ma ja ker jb new adhoc connection banata hon to error ata hai,windows couldnot setup"connection name say 2011"
all required services are enabled and generally i hav checked all setting and update drivers and has updated windows but still problem persist....any solution will be appreciated