On the target Windows 2008 server, can you run the following command and send the o/p
C:\Program Files\BMC Software\BladeLogic\8.0\RSCD>blprops.exe
Also, what version of BL Agent and BL AppServer are you using? This was a defect in 8.0 and has been fixed in 8.1. The 2008 R2 Server is supported, it may just be missing the right description.
Yup, You are right, We are working on BL-8.0 version. so is there any way to getting this OS info in same version (i.e. 8.0) of BL-GUI???
I ran that command which you have provided on Win2008 box, there was a cmd prompt were blinked for a while and some information was there but after a second the window is vanished.
This issue has been resolved in 8.1 sp1. I am not sure if it has a workaround. Someone will help you if there is one.