CustomGS redirects to moduleinterface.php on submit

[chrisbt]

This appears to be a hosting related issue, but I can't identify the difference.

Using CMSMS 1.11.7, CustomGS 1.4, when I (as admin) 'Submit' a change to a field on the General tab, I get redirected to live sites 404 error page 'mysite.com/moduleinterface.php'.

Submitting a change on the 'Field Definitions' or 'Options' tab everything works as expected.

Also the exact duplicate site works perfectly on my development server.

It is as if the admin page post is being sent to the frontend processes.

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Cms Version: 1.11.7
Installed Modules:
CMSMailer: 5.2.1
CMSPrinting: 1.0.4
FileManager: 1.4.3
MenuManager: 1.8.5
MicroTiny: 1.2.5
ModuleManager: 1.5.5
ListIt2CloneFAQs: 1.3.2
GBFilePicker: 1.3.3
ThemeManager: 1.1.8
FormBuilder: 0.7.3
CGExtensions: 1.32.2
ListIt2CloneRecipes: 1.3.2
ListIt2: 1.3.2
CGSimpleSmarty: 1.6.2
ECB: 1.5
TinyMCE: 2.9.12
CustomGS: 1.4
ListIt2CloneDeliveryAreas: 1.3.2
Search: 1.7.8
ListIt2Original: 1.3.2
ListIt2XDefs: 1.1
CGSmartImage: 1.10.7
News: 2.12.12
SiteMapMadeSimple: 1.2.6

Config Information:
php_memory_limit:
process_whole_template:
max_upload_size: 32000000
url_rewriting: mod_rewrite
page_extension: .html
query_var: page
image_manipulation_prog: GD
auto_alias_content: true
locale:
default_encoding: utf-8
admin_encoding: utf-8
set_names: true

Php Information:
phpversion: 5.3.25
md5_function: On (True)
gd_version: 2
tempnam_function: On (True)
magic_quotes_runtime: Off (False)
E_STRICT: 0
E_DEPRECATED: 0
memory_limit: 128M
max_execution_time: 120
output_buffering: 1
safe_mode: Off (False)
file_uploads: On (True)
post_max_size: 32M
upload_max_filesize: 32M
session_save_path: /tmp (1777)
session_use_cookies: On (True)
xml_function: On (True)
xmlreader_class: On (True)

Server Information:
Server Api: cgi-fcgi
Server Db Type: MySQL (mysql)
Server Db Version: 5.1.68
Server Db Grants: Found a "GRANT ALL" statement that appears to be suitable

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Thanks for any suggestions.

Chris

[Rolf]

Are there any related error messages in the PHP errorlog?

grtz. Rolf

[chrisbt]

No messages related to this in the error log.

As far as I can see all other modules function perfectly. I'm just at (beyond) my level of competence in terms of understanding how the modules & core functions, not to mention php configuration.

Any other of where to look gratefully received. Many thanks.

Chris