Help my internet is blocking a program!?

[Den]

I have a automated program on my computer and laptop, i used it around 3 months ago and then when i tried to use it a few weeks ago both my laptop and computer come up with the message "Cannot Connect to Server". There was a free wifi network what i found and it worked on my laptop fine, but the free wifi went after a few days and im back to square one. Does anyone know of a reason why my router would be blocking a program?
It is nothing like that rather a server program im trying to run, plus i do have access to the internet every work fine accept this one program on my internet for some reason, on any other wifi it is fine.