Cannot open a webservice that i published into IIS7 installed on my windows 7 frpm a different computer on different netwrok

Cannot open a webservice that i published into IIS7 installed on my windows 7 frpm a different computer on different netwrok

I have published my website into inetpub in windows 7. I can open the website on my computer using my IP adress and also i can open it on a different home computer. But, when i give the URL to my friends on a different network, they cannot open it. It says connection timed out. I have used Visual studio to build my web service.