Infoset from development to quality

Hello Experts.

I modified the infoset in development system. now i want to send the changes to the quality system.

in infoset screen(sq02) i clicked on transports and then selected export option and also selected

transport infosets and executed then a transport request num is generated and i released that request to quality.

Then in the quality no changes has been reflected .

In quality also i tried an import option and qiven the transport num in dataset with imports option.then i executed it and it generated a import log with following details..

Infoset exists(overwritting not allowed), No code exists for additional field s_num. So please tell me the process how to move my changes from development to quality and then from quality to production.

Thanks for all the replies.