voltage probe in Spectre bsource statement

I have scoured these forums and the online guides and manuals for every bit of information on Spectre behavioral modelling with bsource, yet I've failed to come across any hint as to why I am having this problem. I am using Cadence release IC5141 icfb.exe version 5.1.0, CMOS IC Design Environment Version: Cadence 5.0.0 ,Virtuoso ADE with Spectre simulator. In my design I have elements that must be modelled as behavioral sources, with their CDF parameter set as a function of a certain node voltage on the schematics. For example ........

My Procedure for a Behavioral resistor 

~SubCkt statement~

simulator lang = spectre

subckt b_r (PLUS MINUS)

parameter r = 10

I1(PLUS MINUS) bsource r=r

ends b_r

~Behavioral resistor Symbol Created with a spectre view~

• CDF Type=Base

•  Add CDF Parameter : name =r   paramType=string   parsAsNumber=yes   units=resistance   parceAsCEL=yes(or no, tried both)
• Simulation Information edited : Choose Simulator=specter   otherParameters=model   instParameters=r componenetName=b_r   termOrder=PLUS MINUS

 ~Symbol for the SubCkt b_r inserted into the circuit on the schematic Editor~

• Edit object properties - CDF Parameter r : Value= v(26,0)*1000  

• Select signal to output(save)  = all (or allpub, tried both)
• Select device current (currents) = all (or nonlinear, tried both)
• set subcircuit probe level (subcktprobelvl) = 32 (or 9 or blank, tried it all)
• set AS terminal currents(useprobes) = blank (or yes, tried it both)
• Select AHDL variable (saveahdlvars) = all (or blank, tried it both)

~Create netlist~
         V4 (net026 0)   vsource   dc=0   type=sine   ample=5   freq=10K
         I33 (net026 net019)   b_r   r =v(26,0)*1000 

         ... 

         ...

My problem is that every time i use a voltage probe in the bsource expression it evaluates to zero. so r = v(26,0)*1000 gives me a short 

but r = exp(2)*1000 Or r=10K evaluates correctly. I can not use voltage or current probes such as v(n1,n2) or i("6:0") in my bsource parameter expression, but It makes no sense because I should be able to especially since in spectre.out log file i see that my bsource is being accepted and processed by the software... What is missing here ?? ... Any suggestion would be greatly appreciated - Thank you..