Help!! You don't have permission to access /admin/changedata.php on t

[seannhenderson]

Then its probably your host blocking using some xss filter, like mod sec
check your host error logs

I looked up the error logs on my shared hosting account, and yes, the 403 error was there because the action tripped a filter on Apache mod_security module. Copied and pasted into an email to support and they white listed the file. Works fine now.

Thanks for the tip.