EPMOlapMemberO resets to an old value on client.refresh

Hello People, I'm facing an strange issue:

I have a macro which based on a Entity selection parameter EPMOlapMemberO formula (1), sets a value for other dimensions (2 and 3).

Example:

ENTITY    --> 1) EPMOlapMemberO   

----

CURRENCY --> 2) EPMOlapMemberO

COUNTRY   -->3)  EPMOlapMemberO

It's working ok when user select ENTITY. and then Click a classic refresh button with client.Refresh function.

All i want its to advoid clicking refresh button, If an user select a new ENTITY, report will be refreshed updating values of 2 & 3.

So if i write +client.Refresh after this macro, and Debug, I can see the correct values for CURRENCY; COUNTRY

but after refresh values are Reset to old values. (cache or something¿?)
(I cannot change the original report, only with macros)

Anyone have any clue of what's going on?

Thanks in advance!

Regards