Sony computer or Vista 64bit

Hi, I am having problem getting spark to work. I am using spark 2.5.8 on a sony laptop using vista business 64bit software. everytime i login it give me an login error, Can’t connect to server: invalid name or server not reachable. but when I login using another computer / vista home edition 32bit it work fine. what setting need to be change or is it just vista. thanks

What OS is your Openfire server running on?

Thanks, it’s the sony computer. DLL Error.

What says in the log files?