If /script/scriptname shows perl errors, For example,

Error:
[~]# /scripts/realchpass biznisko 9JXxFh7vcc
Can't locate Crypt/PasswdMD5/XS.pm in @INC (@INC contains: /scripts /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/5.8.8 .) at /scripts/cPScript/CheckPass/UNIX.pm line 6.
BEGIN failed--compilation aborted at /scripts/cPScript/CheckPass/UNIX.pm line 6.
Compilation failed in require at /scripts/cPScript/CheckPass.pm line 6.
BEGIN failed--compilation aborted at /scripts/cPScript/CheckPass.pm line 6.
Compilation failed in require at /scripts/realchpass line 16.
BEGIN failed--compilation aborted at /scripts/realchpass line 16.

Do the following to fix this:

cd /usr/src/perl588installer
./install