Ram,
When the request is getting activated - you will not have a request number - the request number ( even though it exists in principle ) will not be recorded until the request is fully activated.
It is kind of hard to find out where your activation process is at because :
1. The DTP packages the data into request sizes that are based on the DTP settings and the memory settings
2. The DSO packages the same differently when trying to activate the data.
You can get a fair idea of where your activation is at by
Comparing the number of data packets in the DTP and then go to SM37 and look at the activation job log to see how many packets got activated - this will give you an idea but not an exact measure of how much data has got activated.