Connect Windows Client to Mikrotik OpenVPN Server

Hello,
i have an OpenVPN Server Running on RB1000 ROS 3.28 with user an password auth for clients (no cert or key)

From RBs with ROS there is no problem , but on Windows Client i got

Wed Sep 16 16:11:34 2009 ERROR: There is a clash between the --ifconfig local address and the internal DHCP server address -- both are set to 10.254.2.2 -- please use the --ip-win32 dynamic option to choose a different free address from the --ifconfig subnet for the internal DHCP server

On RB1000 server config:

/interface ovpn-server server 
set port=xxxx mode=ethernet netmask=32 max-mtu=1400 keepalive-timeout=60 default-profile=default certificate=cert1 auth=md5 cipher=aes128,aes256

Client secret:

/ppp secret 
add name=<hidden> password=<hidden> service=ovpn profile=default local-address=10.254.2.1 remote-address=10.254.2.2

On Windows client-conf.ovpn:

client
dev tap
auth-user-pass
proto tcp
remote xxx.xxx.xxx.xxx xxxx
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cipher AES-128-CBC
verb 3

Connection to Linux OpenVPN Servers are fine.

Has anyone an idea?

Greetings
Manuel Ritter