I Installed 2 level header menu module and suddenly my site went down displaying an erorr INTERNAL SERVER ERROR, misconfigure kidnly contact your administartor

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What steps will reproduce the problem?
1.
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What is the expected output? What do you see instead?
Requested you to provide cause of this type errors and solution for this and 
get back my site working.

vQmod Version: 1.5.6.1
Server Operating System:apache


Please provide any additional information below.
I installed recently a new module "Level 2 Header Menu", and suddenly my site 
stopped working and started displaying an erorr INTERNAL SERVER ERROR 
misconfigured contact you administrator (attaching screenshot for reference), 
later i replaced all the backup files, but still it did not resolved my 
problem. kidly request you to provide me the solution for this in detail, 
Thanks in advance.

Original issue reported on code.google.com by [email protected] on 21 Jan 2015 at 7:49

Attachments:

• [Intrenal server error.png](https://storage.googleapis.com/google-code-attachments/vqmod/issue-183/comment-0/Intrenal server error.png)