Mikrotik to Fortinet VPN using WiFi Interface

RouterOS Beginner Basics
1

I have a Mikrotik RB951 series Wireless router and I am trying to setup an IPSEC VPN with a Fortigate Firewall. Whilst trying the configuration the Mikrotik continously crashes and I cannot test alot because of these interruptions. I managed to use WLAN 1 as the WAN interface and when I setup IPSEC all is ok until I configure the IPSEC Policy.

I am new to mikrotiks and first and foremost I would like to have a stable router on which to test. I have version 6.40.4. I was thinking of uninstalling some unwanted packages from it like mpls etc so that maybe could help. Anyone can help out about the stability issue or configuration ??

2 
/ip ipsec proposal
set [ find default=yes ] enc-algorithms=aes-128-cbc pfs-group=modp1536
add enc-algorithms=aes-128-cbc name=sha1-aes128-modp1536 pfs-group=modp1536

/ip ipsec peer
add address=1.1.1.1/32 dh-group=modp1536 dpd-maximum-failures=3 enc-algorithm=aes-128 \
    nat-traversal=no passive=yes secret=presharedkey send-initial-contact=no

/ip ipsec policy
set 0 disabled=yes
add dst-address=1.1.1.1/32 proposal=sha1-aes128-modp1536 src-address=2.2.2.2/32


/interface gre
add dont-fragment=inherit keepalive=10s,3 mtu=1428 name=gre-tunnel10 remote-address=\
    1.1.1.1

/ip address
add address=172.16.2.38/30 interface=gre-tunnel10 network=172.16.2.36

/ip firewall mangle
add action=change-mss chain=forward comment=MSS new-mss=1388 out-interface=gre-tunnel10 \
    passthrough=yes protocol=tcp tcp-flags=syn tcp-mss=!0-1338




config system settings
    set allow-subnet-overlap enable


config vpn ipsec phase1-interface
    edit "TEST"
        set interface "wan"
        set peertype any
        set proposal aes128-sha1
        set dhgrp 5
        set nattraversal disable
        set remote-gw 2.2.2.2
        set psksecret presharedkey
    next
end
config vpn ipsec phase2-interface
    edit "TEST"
        set phase1name "TEST"
        set proposal aes128-sha1
        set dhgrp 5
        set auto-negotiate enable
        set encapsulation transport-mode
        set protocol 47
        set keylifeseconds 1800
    next
end
config system gre-tunnel
    edit "tunnel10"
        set interface "TEST"
        set remote-gw 2.2.2.2
        set local-gw 1.1.1.1
    next
end
config system interface
    edit "TEST"
        set vdom "root"
        set ip 1.1.1.1 255.255.255.255
        set type tunnel
        set remote-ip 2.2.2.2
        set interface "wan"
    next
end
config system interface
    edit "tunnel10"
        set vdom "root"
        set ip 172.16.2.37 255.255.255.255
        set allowaccess ping
        set type tunnel
        set tcp-mss 1388
        set remote-ip 172.16.2.38
        set mtu-override enable
        set mtu 1428
        set interface "TEST"
    next
end