TeamViewer and Win 7 Firewall

I use TeamViewer solely to access my 'main' PC in the 'office' from my laptop using the LAN. The PC is Win 7 Ult x64 and the laptop is XP Home x86.

Everything was fine until a few days ago when I started having problems with access and it looks like it's the Win 7 firewall, as I can access the laptop from the PC, and then switch sides and it's fine, but I cannot initiate a connection from the laptop. I also tested this by installing TeamViewer on my wife's Vista machine and got exactly the same situation.

TeamViewer is allowed in Inbound rules in the Win 7 firewall, twice in fact. Anyone here understand the firewall well enough to suggest what to tweak?

 

Problem resolved.