I have SharePoint 2010 Standard German on my server. The SPSFarmReport doesn't work an shows a NullPointer exception. I thought it is because of the different Assemblies. So I tried to rebuild your software,
 
but it required a "System.Web.dll" for this code phrase:
 
{code:c#}
System.Web.Configuration.AuthenticationMode authMode;
{code:c#}
And this i just found this dll in the .Net Framework 4.0, not the 3.5.
 
Can't you please upload your full project? That would be very helpful for me.