Zoho Creator getURL hangs and does not return

Zoho Creator getURL hangs and does not return

Hi,
I am trying to use getURL to integrate with a bulk SMS provider. The following URL (with actual password etc) works fine from a browser
 
http://bulksms.mysmsmantra.com:8080/WebSMS/SMSAPI.jsp?username=xxx&password=yyy&sendername=Rentoys&mobileno=9199999999&message=Hello+World
 
However when I use it with getUrl, the call hangs and never returns. I have tried passing headers (User-Agent etc) and I have tried simple and detailed response. But none of the options return.
 
Is there any way to debug this? Is there a limitation connecting to any port other than port 80?
 
Vikas