AutoCAD Inventor :: How To Get Parameter From IPT File

I created a *.iam file. And from this asembly file, I need run some rules in *.ipt file.

I use

Parameter("PartA:1", "d12") = d12

to give d12 parameter in my assembly to d12 parameter in *.ipt. It works.

But I need get parameter in the *.ipt file after running the rules in *.ipt.

so, I put 

d13 = Parameter("PartA:1", "d13")

following above line.

But everytime, I just be able to get the result before *.ipt run the rules, not after.

I noticed the rules in assembly were compeletely run, then run the rules in *.ipt. So, the result is not correct.

I am using Inventor 2009 with ilogic. XP OS.

Autodesk Inventor Professional 2013 (64 Bit) SP2
Windows 7 Professional Service Pack 1
Intel(R) Xeon(R) CPU E5645
12.0 GB Memory