This could be because you missed to install the OpenSSL libraries. You can find them here:
Probably you'll also need the Visual C++ 2008 Redistributables.
You are advised to use the 32 bit or 64 bit version according to your operating system.
We also recommend you to copy the files libeay32.dll and libssl32.dll into your Gamers.IRC main directory.
You should be able to connect via SSL now.