Hello
Check this guide
https://websmp209.sap-ag.de/~sapdownload/011000358700001254052012E/T067_UMG_SAPME_61_FINAL.pdf
Supported Source Versions
The upgrade to SAP ME 6.1 is supported from the following source versions:
SAP ME 6.0
SAP ME 5.2
http://wiki.sdn.sap.com/wiki/display/ME/Home
Regards
RB