Few checks:
1) Is your firewall disabled, and if it is port forwaded, are your ports open.
2) Have you set up server.cfg properly, and if so, provide information about it.
3) Is your port in swf (through yogda) same as the one you have designated for the server?
4) Have you saved client and sent right one?
If the answer for all the checks is yes, please add me on Skype. (Check my signature).