Error during PSS simulation of MIXER in Cadence

I designed mixer in cadence for 2MHz IF , and my RF frequency is 2.4 Ghz and i am taking LO frequency is 2.389Ghz . When i do PSS-PAc analysis foe setting the LO drive it give error that is PSS in not converge due to this error i am not able to doing any analysis of mixer . which parameter affect this error and how to resolve this problem.
PLEASE help me...

LO frequency is too far from IF frequency, try QPSS..

Thank you sir for reply.
How to do matching of mixer Ports (IF , Rf, LO) to 50 ohm and which frequency RF(2.4 Ghz ) or IF(2Mhz) or Lo(2.401Ghz). For see IF frequency i should do transient analysis.
Rpl Plz its urgent