OpenVPN 2.1.1 and some issues ..

Dear All,
Greetings ,
I have two questions please ,
1))
when i say : OpenVPN 2.1.1 i686-pc-cygwin [SSL] [LZO2] built on May 7 2010,
Do we have Upadted version ?
2))
and , my Astaro SSL VPN stuck on this line :
WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this

how we can prevent this ? (( Using auth- nocache ))
3))
can we speed up the connection ? i noticed that there is an encryption of 128 Bit , if we changed this can we speed it up ?
for ex. :
Data Channel Encrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Thu Mar 29 12:38:06 2012 Data Channel Encrypt: Using 128 bit message hash 'MD5' for HMAC authentication
Thu Mar 29 12:38:06 2012 Data Channel Decrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Thu Mar 29 12:38:06 2012 Data Channel Decrypt: Using 128 bit message hash 'MD5' for HMAC authentication
Thu Mar 29 12:38:06 2012 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA




Thanking you in advance ,
Regards