chmod problem with mkdir()

Hello List, i have a problem with simple script that uses mkdir(); mkdir("/path/path/folder", 0777); The highest chmod i get in created folder is 755, the 777 is ignored, but less chmod like 705 accepted. What could be wrong? Of course i can use chmod() after mkdir() but i think function should do what it is promising... script is running with php-cli 5.2.6 Thank you Andre