it complains about the fact that your PEM file does not seem to be a valid private key; open the file using a text editor and look for blocks similar to
-----BEGIN RSA PRIVATE KEY-----
MIICXQIBAAKBRtC+Tk4cW2Au4RDSr/SJ0agbgtcNzRNbi/BCcktyK1Qa2qoBK1/B
.....
-----END RSA PRIVATE KEY-----
PS Do
NOT post your private key here !