| Address: | Ernakulam, Kerala |
Sir,
I purchased "gate 2015 computer science and information technology by g k publications and received a dvd along with the book . I installed the test engine and on clicking "activate" button, an error message is displayed like " invalid key". But i entered key printed on the dvd disc. So please do needful for acivation.
Thanking you,
Sabitha m g
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