Manager gives me blank page on several manager actions

Hi, yesterday i installed Newspublisher (latest version) and put the newspublisher snippet into a document for frontend editing, later on that day i went on to create a new document in the manager back-end, it gave me a white/blank page. I can`t edit documents, create new documents or view some sections in the manager without it gaving me a white page.

I`m using MODx Revolution 2.2.0 pl2 traditional with FURL`s enabled.
- PDO engine is installed and everything configuration related seems okay.
- PHP version 5.3.9
- MySQL version 5.5.20
- Apache version 2.2.14
- CentOS 6 on a Virtual private server
- 64 mb memory limit in php.ini (should be enough and i know it is)

This error appeared after i installed Newspublisher. Editing / creating a document in the manager back-end worked before i installed it.

Any help or advices are welcome.

Regards,
Bow

I got it resolved, it was a snippet and template variable that caused the blank pages. I removed it and now it works excellent. Modx revolution is great!