Right now I already know why the problem appear already.

This problem is cause by the module of "protector 2.56"
That means this problem occur after I edit the mainfile.php :


include( XOOPS_ROOT_PATH . '/modules/protector/include/precheck.inc.php' ) ;

if (!isset($xoopsOption['nocommon'])&& XOOPS_ROOT_PATH != ' ') {
include XOOPS_ROOT_PATH."/include/common.php";
}
include( XOOPS_ROOT_PATH . '/modules/protector/include/postcheck.inc.php' ) ;


Then after I replace it with the original mainfile.php, the "myalbum" module can works properly already.

But now, if I never edit the mainfile.php, then how am I going to use the "protector 2.56" module ??

Is it possible that these two modules cannot be use together??

Hope to solve this problem soon, thanks!