"No connection module found" Error

Hi

I am new to Cadence tools

i wrote a simple verilog code for not gate and imported it to virtuoso to simulate it using AMS

 the not gate is connected to a square wave generator from analoglib

now after giving necessary connections i tried to run the simulation but it shows the following error

Compilation successful.
ncelab: 09.20-s045: (c) Copyright 1995-2011 Cadence Design Systems, Inc.
DEFINE ser /usr/cadence/ccstools/cdsind1/Software/ser
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ncelab: *W,DLCPTH (/usr/cadence/ccstools/cdsind1/Software/IC613_lnx86/share/cdssetup/cds.lib,5): cds.lib Invalid path '/usr/cadence/ccstools/cdsind1/Software/ser' (cds.lib command ignored).
DEFINE fggh /usr/cadence/ccstools/cdsind1/Software/fggh
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ncelab: *W,DLCPTH (/usr/cadence/ccstools/cdsind1/Software/IC613_lnx86/share/cdssetup/cds.lib,6): cds.lib Invalid path '/usr/cadence/ccstools/cdsind1/Software/fggh' (cds.lib command ignored).
DEFINE not /usr/cadence/ccstools/cdsind1/Software/not
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ncelab: *W,DLCPTH (/usr/cadence/ccstools/cdsind1/Software/IC613_lnx86/share/cdssetup/cds.lib,10): cds.lib Invalid path '/usr/cadence/ccstools/cdsind1/Software/not' (cds.lib command ignored).
DEFINE not_gate /usr/cadence/ccstools/cdsind1/Software/not_gate
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ncelab: *W,DLCPTH (/usr/cadence/ccstools/cdsind1/Software/IC613_lnx86/share/cdssetup/cds.lib,11): cds.lib Invalid path '/usr/cadence/ccstools/cdsind1/Software/not_gate' (cds.lib command ignored).
DEFINE not_gate_new /usr/cadence/ccstools/cdsind1/Software/not_gate_new
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ncelab: *W,DLCPTH (/usr/cadence/ccstools/cdsind1/Software/IC613_lnx86/share/cdssetup/cds.lib,12): cds.lib Invalid path '/usr/cadence/ccstools/cdsind1/Software/not_gate_new' (cds.lib command ignored).
    Elaborating the design hierarchy:
ncelab: *N,SFEDPL: Deploying new SFE in analog engine.
    Discipline resolution Pass...
net4 ) );
   |
ncelab: *E,CUVNCM (./ihnl/not1/not_gate/schematic/verilog.vams,18|3): No connection module found:Need an input port of continuous discipline electrical, and an output port of discrete discipline logic, at instance not_gate.I0.
Failed to elaborate ("not1" "not_gate" "config").

on searching the net i found it is mostly due to the absence of connect libraries 

i tried adding connection libraries from thefolder affirma_ams , however in vain

can you please help me to as what libraires should i add or if even this is the actual problem 

i searched the forum, but still i couldnt solve it

thanks in advance

deepak