[Users] Certificate failure

I setup openser with TLS, and configured eyebeam as client. I installed rootCA on one laptap and one desktop. Strange thing is the eyebeam on desktop works well, but the same setup (Same setting in eyebeam, same rootCA installed) does not work on Laptop, It always returns 503 certificate failure. The log on eyebeam shows errors below. Any idea what is going on? Thanks, Stephen [06-12-01]10:25:17.611 Error (min) RESIP "Error when verifying server's chain of certificates: self signed certificate in certificate chaindepth=1 /CN=Stephen_Li/ST=IL/C=US/emailAddress=w13738(a)email.mot.com/O=MultiMediaIMS " [06-12-01]10:25:17.612 Error (min) RESIP:TRANSPORT TLS connection failed ok=-1 err=1 error:00000001:lib(0):func(0):reason(1) [06-12-01]10:25:17.612 Error (min) RESIP:TRANSPORT (SSL Error ssl) [06-12-01]10:25:17.634 Error (min) RESIP:TRANSPORT error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed [06-12-01]10:25:17.634 Error (min) RESIP:TRANSPORT Error code = 336134278 file=.\ssl\s3_clnt.c line=844 [06-12-01]10:25:17.634 Error (min) RESIP:TRANSPORT Couldn't TLS connect