Hi Mohit,
It sounds like you may have an issue with your product configuration groups in the Admin Console. They may not be mapped correctly. Here is a similar question where a user just wasn't an Admin. I've copied and pasted the relevant information below:
Unable to create web properties
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Have a look at a video and knowledge base article I produced a few weeks ago (linked below). In both of these, I show how to properly set up a permissions group in the Admin Console and map it back to a DTM permission level.
Video - How To: Map a Product Configuration Group - YouTube
KB Article - Map a product configuration to a solution permissions group
You can check to see if your existing groups are mapped to DTM permissions correctly by launching the admin console --> click on products from the left nav --> click on DTM --> click on one of the "admin" permissions groups --> look for the mapping (shown in red below)

Cheers,
Jantzen