I have this kind of issue:
Sat Jan 10 11:37:59 2015 OpenVPN 2.3.6 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO]
[PKCS11] [IPv6] built on Dec 1 2014
Sat Jan 10 11:37:59 2015 library versions: OpenSSL 1.0.1j 15 Oct 2014, LZO 2.08
Sat Jan 10 11:37:59 2015 WARNING: No server certificate verification method has
been enabled. See http://openvpn.net/howto.html#mitm for more info.
Sat Jan 10 11:37:59 2015 UDPv4 link local (bound): [undef]
Sat Jan 10 11:37:59 2015 UDPv4 link remote: [AF_INET]176.101.177.254:1194
Sat Jan 10 11:37:59 2015 WARNING: this configuration may cache passwords in memo
ry -- use the auth-nocache option to prevent this
Sat Jan 10 11:37:59 2015 [synology.com] Peer Connection Initiated with [AF_INET]
176.101.177.254:1194
Sat Jan 10 11:38:02 2015 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Sat Jan 10 11:38:02 2015 open_tun, tt->ipv6=0
Sat Jan 10 11:38:02 2015 TAP-WIN32 device [Ethernet 4] opened: \\.\Global\{6AB66
35E-A98E-4A0D-87E9-CB869F0B0025}.tap
Sat Jan 10 11:38:02 2015 Notified TAP-Windows driver to set a DHCP IP/netmask of
192.168.2.6/255.255.255.252 on interface {6AB6635E-A98E-4A0D-87E9-CB869F0B0025}
[DHCP-serv: 192.168.2.5, lease-time: 31536000]
Sat Jan 10 11:38:07 2015 ROUTE: route addition failed using CreateIpForwardEntry
: Access is denied. [status=5 if_index=11]
Sat Jan 10 11:38:17 2015 env_block: add PATH=C:\Windows\System32;C:\WINDOWS;C:\W
INDOWS\System32\Wbem
Sat Jan 10 11:38:17 2015 ERROR: Windows route add command failed [adaptive]: ret
urned error code 1
Sat Jan 10 11:38:17 2015 ROUTE: route addition failed using CreateIpForwardEntry
: Access is denied. [status=5 if_index=11]
Sat Jan 10 11:38:17 2015 env_block: add PATH=C:\Windows\System32;C:\WINDOWS;C:\W
INDOWS\System32\Wbem
Sat Jan 10 11:38:17 2015 ERROR: Windows route add command failed [adaptive]: ret
urned error code 1
Sat Jan 10 11:38:17 2015 ROUTE: route addition failed using CreateIpForwardEntry
: Access is denied. [status=5 if_index=11]
Sat Jan 10 11:38:17 2015 env_block: add PATH=C:\Windows\System32;C:\WINDOWS;C:\W
INDOWS\System32\Wbem
Sat Jan 10 11:38:17 2015 ERROR: Windows route add command failed [adaptive]: ret
urned error code 1
Sat Jan 10 11:38:17 2015 Initialization Sequence Completed
I tried to run it as admin several times and still no change.
Server is running on Windows 7 and my client is on Win 8.1 x64
I have the newest version of openVPN client
Here´s config of client side: (unfortunatelly i dont have server side

dev tun
tls-client
remote 176.101.177.254 1194
dhcp-option DNS 8.8.8.8
dhcp-option DNS 8.8.4.4
pull
proto udp
script-security 2
ca XXXXXXX.crt
comp-lzo
reneg-sec 0
auth-user-pass XXXXXXX.txt
Does anybody have the same experience and can help ?
Many thanks