CCK fields disappears
The issue you're running into sounds as if the file permissions are messed up; here's a checklist of things to go through:


Open .info files of those modules and verify that they exist and have all regular information (name, dependencies, version, etc.).
If they exist and have all info, check if they have some weird file access permissions; this could prevent Drupal from reading the content. See file permission instructions for Linux servers, specifically the commands which ensure that the proper permissions are in place:

[root@localhost]cd /path_to_drupal_installation
[root@localhost]chown -R YOUR_USERNAME:www-data .
[root@localhost]find . -type d -exec chmod u=rwx,g=rx,o= '{}' \;
[root@localhost]find . -type f -exec chmod u=rw,g=r,o= '{}' \;

Try replicating the issue on a clean install AND on a clean install with the same installation files.
If the above steps don't tell you anything and you still have the issue - hack the core, specifically _module_parse_info_file() function in includes/module.inc and do a var_dump() or print_r() on the $info variable once it parses the file. Maybe the formatting is off, encoding or something else. This might get you a step further if everything else fails.


Hope this helps.