uac should not open when i start my appplication on vista

Question

hi,

 

 

i have a C# windows form application which is signed with digital signature.

It works fine on windows 7, windows 8( the uac prompt  is not occurring ).

even though i have digital signature, when i install the application in vista it ask for uac permission for every launch of application.

help me to sort it out.....

 

 

Thanks Regards,

Sujay