On my modules admin page, I have only a single line where I can update the system module. No other buttons or modules appear.

I have cleaned the xoops data caches and updated the system module. I also tried overwriting the system module with fresh files and then updating. No luck.

Suggestions welcome.

XOOPS Version XOOPS 2.4.4
PHP Version 5.2.4
mySQL Version 4.1.22-standard
Server API cgi
OS Linux
safe_mode Off
register_globals On
magic_quotes_gpc On
allow_url_fopen On
fsockopen On
post_max_size 64M
max_input_time 100
output_buffering
max_execution_time 100
memory_limit 128M
file_uploads On
upload_max_filesize 64M

have you try on the debug in xoops system preferences? what message comes up ?

you can also enable it through phpmyadmin...

Thanks.

It always seems to be a simple answer. The debug showed me that I was missing one file in Protector module.

Replaced and it seems good now.