can't export vcenter 55 vds imported config to vCenter 65

Hello Experts,

Can someone suggests a way to import distributed switch configuration from VC 5.5 to VC 6.5 distributed switch.

Things already tried but failed:

1) Imported vds config from vc 55 via webclient and imported it to vc 65 (Wizard goes through but can't see the switch either the PGs)

2) Imported vds config from vc 55 via webclient and imported it to vc 60 it worked but when imported from 6.0 to 6.5 can't see the switch either the PGs

Prakash