pls help me out : Could not find file 'Microsoft.Windows.CommonLanguageRuntime, Version=2.0.507

hi all,

problem in green is solved(i have pasted for reference only), but as just after it i m getting this

Could not find file 'Microsoft.Windows.CommonLanguageRuntime, Version=2.0.50727.0'.

can anyone help me to solve above problem or tell where i can find docs on problem mention above.

thanks and regards,

~Reverser

i m getting problem inh my project, which in VB.NET.
Actually i was developing a small software, to be familier with visual basic.NET, as i was coding with Visual Basic.
everything was running very fine, day before i installed winXp again ( freash installeation). Then simply VS 2005,with out any error.
Now i m able to open, my project, i can edit it, but if i try to build the executable, or compilation. it is giving strange error.
below what error IDE is giving

here i m also posting a screen shot of error on image hack, see that also for ref.
http://img442.imageshack.us/img442/8112/error1fh5.jpg

[1786 byte] By [reverser] at [2007-12-28]