Problem in Process chain due to Aggregate Roll-up

Hi,
I have a Infocube with Aggregates built on it. I have loaded data in the Infocube from 2000 to 2008, Rolled up & Compressed the aggregates for this.
I have also loaded the 2009 data in the same Infocube using Prior Month & Current Month Infopackage for which i am only Rolling up the aggregate and no Compression of aggregates is done. The Current & Prior month load runs through Process chain on a daily basis at 4 times per day. The Process chain is built in such a way that it deletes the overlapping requests when it is loading for the second/third/fourth time on a day.
The problem here is, when the overlapping requests are deleted, the Process Chain is also taking the Aggregates compressed requests (2000 to 2008 Data), de-compressing it, De-activating the aggregates, Activating the Aggregates again, Re-filling & compressing the aggregates again. This nearly takes 1 hour of time for the Process Chain to run which should take not more than 3 minutes.
So, what could be done to tackle this problem? Any help would be highly appreciated.
Thanks,
Murali

Hi all,
Thanks for your reply.
Arun: The problem with the solution you gave is "Untill i roll-up the aggregates for the Current & Prior Month Infopackage the Ready for Reporting symbol is not appearing for the particular request".
Thanks,
Murali

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Hi.....
Today...I checked delta queue...there are no records for my request...then went into IP for Initialisation and choose option 'Delta Initialisation without data transfer'....and tried to schedule it.....it shows message:
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Problem in Process chain due to Aggregate Roll-up

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