Hi, I haves been faced with a similar problem in 11_7_8_ZeroXI an the php 5.6 plugin I detected that there was a difference between the php 5.6.dll filenames in the apache config file (httpd.conf) and the corresponding filenames in the php56 directory. e.g.: in the Apache httpd.config file : <IfDefine php56> ... LoadFile ${US_ROOTF}/core/php56/icudt53.dll .... but the corresponding dll filename in the php55 directory was icudt54.dll My solution : After adjusting all the corresponding .dll filenames in the httpd.conf file Apache started smoothly.