DD-WRT NETGEAR R7000P - OPEN VPN PROBLEMS

[bardhi]

hello i just upgrade/flash my router from Original first time to last version of DD-WRT :

Firmware: DD-WRT v3.0-r54682 std 01/02/24

all work good just iam have problems when try to configure VPN - IPVANISH all configure from this

After all installed and reboot no succses on VPN CONFIGURATION this errors i get:
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Jan 8 00:29:32 DD-WRT user.info : [openvpn] : OpenVPN daemon (Client) starting/restarting...
Jan 8 00:29:32 DD-WRT daemon.warn openvpn[5030]: WARNING: Compression for receiving enabled. Compression has been used in the past to break encryption. Sent packets are not compressed unless "allow-compression yes" is also set.
Jan 8 00:29:32 DD-WRT daemon.err openvpn[5030]: Options error: Unrecognized option or missing or extra parameter(s) in /tmp/openvpncl/openvpn.conf:28: keysize (2.6.8)
Jan 8 00:29:32 DD-WRT daemon.warn openvpn[5030]: Use --help for more information.

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Please anyone can help me what iam doing wrong how i can fix this? THANKS REGARDS