Registry Edit By c# on Vista OS problem

Question

hi,

i am developed a small win apps by c# and my apps first put some value in windows registry. so i just create a setup and install on Vista OS. when i run my apps then a error occur for registry accessing. if the log on user is admin on vista OS then it is OK but if the user is normal user on Vista then getting error for programmatically accessing vista OS registry. i search Google and found article and they said to add manifest to Exe file to gain admin privilege on vista but still i am getting error. so please some one tell me how could i access registry on Vista OS as normal log on user. please tell me all the steps in detail.

Thanks