shower control, dial type

Hi -
We had a Kohler shower control installed about a year ago. Now it is coming off of the shower wall and I can't get it to screw back in. I can only turn it so far. THere is a gap between the base and the shower wall. I can see threads but I can't get the unit to screw back in.
Any advice would be greatly appreciated!
Jon
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Call Kohler customer service and they will send you a copy of the installation documents that you foolishly discarded <G>. We all make mistakes, hopefully never the same ones twice. Good luck.
Joe
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.