Hi Abbas,
If you are referring to CUCM 6.1(3), there is no current upgrade path from CUCM 6.1(3) to CUCM 7.0 :(
See:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/compat/ccmcompmatr.html
Release Notes for Cisco Unified Communications Manager Release 6.1(3)
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Updated January 6, 2009
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**Caution: Be aware that you can not upgrade directly from Unified CM 6.1(3) to Unified CM 7.0
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/rel_notes/6_1_3/cucm-rel_note-613.html
If you look in the supported Upgrade Paths in the first link that I sent you will also see that there are no upgrades shown from 6.1(3) to any of the current 7.x versions (it doesn't jump out but look closely :)
Hope this helps! Sorry man!
Rob