Quest FIM Powershell Snapin - Unable to install.

Hi,

 I am trying to install Quest FIM Powershell Snapin. I dowloaded from Codeplex and added the DLL "Quest.FIMPowershellSnapin.dll" into the assembly. In powershell i checked whether the snapin is registered or not and the results showed that this Quest sanpin is registered. But When i try to add "Add-PSSnapin Quest.FIMPowershellSnapin", it is givivng me an error

Add-PSSnapin: Cannot load  windows powershell snapin "Quest.FIMPowershellSnapin.dll" because of the following error "The windows powershell snapin module Quest.FIMPowershellSnapin.dll does not have required  windows powershell snapin  strong name Quest.FIMPowershellSnapin version=1.0.0.0,Culture=neutral,PublicKeyToken=null".

Please help

Thanks

Prasanthi.