Formatting A Phone Number

I've been messing around with this for a while now and can't figure it out. I'm trying to use this code to pull a person's phone number out of a database:

<%
call GetAddrInfo ("BenPhone_v",datavalue)
if datavalue = TRUE then
%>
<%call GetAddrInfo ("BenPhone",datavalue)%>
Phone Number: <%=datavalue%>
<%end if%>

What it returns is an unformatted phone number (ie: 5555555555) Nothing I've tried will format the number. I think the problem is the code that's being used to retrieve data from the database, but I'm not sure: Code: