I agree with all the above comments. I have just gone through this process myself. The documents that i had to submitt were as follows:

My ID and Passport info
3months Bank statement from my account (salary account)
Company letter NOC
Marriage Cert
My wife's birth Cert
My daughter's birth Cert(has to have both mother and father named on it, i.e you and your wife)
Professional qualification cert (although not sure why as i have my RP) but there you go.
and last but not least, the accomodation contract.

It is being processed now so i guess we are just waiting...

good luck