PSpice error while simulating 555 ic

Hi!
M new to Pspice.. (have to use it for a project). while simulating a simple 555 IC circuit in Pspice i am getting the following error msg. Could anyone tell me what should i do to resolve this?

Error Msg:

*** 07/17/13 14:58:34 ***** PSpice 16.6.0 (October 2012) ***** ID# 0 ********

** Profile: "SCHEMATIC1-555" [ \\home.org.aalto.fi\singhr1\data\Desktop\test-PSpiceFiles\test-PSpiceFiles\SCHEMATIC1\555.sim ]


**** CIRCUIT DESCRIPTION


******************************************************************************




** Creating circuit file "555.cir"
** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS

*Libraries:
* Profile Libraries :
* Local Libraries :
* From [PSPICE NETLIST] section of Z:\cdssetup\OrCAD_PSpice/16.6.0/PSpice.ini file:
.lib "nom.lib"

*Analysis directives:
.TRAN 0 .05ns 0
.OPTIONS NOPAGE
.OPTIONS ADVCONV
.PROBE64 V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*))
.INC "..\SCHEMATIC1.net"



**** INCLUDING SCHEMATIC1.net ****
* source TEST
X_X1 0 N00229 N00225 N00203 N00233 N00229 N00241 N00203 555D PARAMS:
+ MAXFREQ=3E6
R_R1 N00225 0 2.2k TC=0,0
R_R2 N00241 N00229 1.0 meg TC=0,0
--------------------------------$
ERROR(ORPSIM-16145): unknown parameter
R_R3 N00241 N00203 2.2k TC=0,0
C_C1 0 N00233 10n TC=0,0
C_C2 0 N00229 360p TC=0,0
V_V1 N00203 0 5Vdc

**** RESUMING 555.cir ****
.END


The error is the space in the R2 resistance value.

Hi!
Thnx for the suggestion.
The output pulse i am getting now is of 4.5 V. I want the desired output pulse of 20 Volts. How can I arrange multiple of these 555IC circuit in series to get 20 V output?