Why doesn't this work?

[Bill Vlahos]

I’m using LiveCode 7.0.4 on Mac OS 10.10.3. I want to figure out the time zone for an area code. I found a web service for this.

I want to be able to pass the area code to the http query as a variable. It works if I hard code it but not if I concatenate it.

If I put the following code in a button it works.
   put URL "http://www.webservicex.net/uszip.asmx/GetInfoByAreaCode?USAreaCode=805" && "HTTP/1.1"


If I put the following code in the button it fails.
   put "805" into vAC
   put URL "http://www.webservicex.net/uszip.asmx/GetInfoByAreaCode?USAreaCode=" & vAC && "HTTP/1.1"


Why?

Thanks,
Bill Vlahos