BlocklyProp Client Error

Hey guys,
I'm trying to get blocklyprop running on my sons computer. I'm having problems with the client. When I run it I get an error "BlocklyPropClient returned -1".

System Windows 7 Pro 64bit
Does the client need SP1? I am having problems getting SP1 to install.
I have tried Blocklyprop client 32 and 64 bit. No luck on either.

Any advice would be much appreciated.

Thanks
Shawn