[support] Role unable to post a content type

[Lluís]

I have a drupal5 site with taxonomy access installed. I have created
some custom content types and a couple of administrative roles (one to
manage content and another to manage content, taxonomy, blocks,
etc...).

Now a user of "role1" is able to post contenttype1 but unable to post
contenttype2
If I add user to "role2" he is able to post contenttype1 and contenttype2

I tried checking all permissions in "Access Control" for role1 with no
result, and also doing the same in all taxonomy access control for
role2 with no results.

How can I guess which module is blocking create permission to role1?

Thanks.

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