Simple test is running 'lxphp.exe -v'. If didn't found error Warning: PHP Startup: Unable to load dynamic library...' that mean no problem with php for panel itself. If you found error, to make sure you see:
[root@next ~]# lxphp.exe -v
PHP 5.3.28 (cli) (built: Mar 5 2014 17:33:49)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2013 Zend Technologies
[root@next ~]#
For php-fpm problem for web, try change php-branch and php-type to other and change back to original.
Yes, I found this issue for php54 but using php53u or php55u (when using Centos 6) is OK.