Using LAPLACE model in PSPICE

Hi,

I was trying to replace a Resistance (345 ohm) and inductance(2.6mH) in series in my circuit with a Laplace model available in Pspice ABM Library. Since the Laplace for a RL circuit is R+Ls , I updated the 1/1+s as 1/345+0.0026s but the results obtained were not matching with the case where I was using the resistance and inductance components directly. Am I doing any mistakes in using this Laplace model? I would like to know whether anybody has used this previously,

Thanks in advance

regards

Madhuraj