Some help with ssl

I've been trying to secure an apache sever with ssl but I keep the following error after I enter my attributes - can anyone help. Thanks:
 
Error adding attribute3556:error:0D0BF041:asn1 encoding routines:ASN1_item_dup:malloc failure:.\crypto\asn1\a_dup.c:104: problems making Certificate Request
 
See the full print out of the command I issued below:
 
C:\Program Files\Apache Software Foundation\Apache2.2\bin>openssl req -config .\openssl.cnf -new -out myserver.csr
Loading 'screen' into random state - doneGenerating a 1024 bit RSA private key...........................................++++++.......++++++writing new private key to 'privkey.pem'Enter PEM pass phrase:Verifying - Enter PEM pass phrase:-----You are about to be asked to enter information that will be incorporatedinto your certificate request.What you are about to enter is what is called a Distinguished Name or a DN.There are quite a few fields but you can leave some blankFor some fields there will be a default value,If you enter '.', the field will be left blank.-----.
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A challenge password []:vj150Error adding attribute3556:error:0D0BF041:asn1 encoding routines:ASN1_item_dup:malloc failure:.\crypto\asn1\a_dup.c:104: problems making Certificate Request
C:\Program Files\Apache Software Foundation\Apache2.2\bin>
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