[WL-500gP with Oleg] How do I properly port forward?

[MariosX]

Hello!
So I have everything up and running finally on my old WL-500gP router.
However, I have a problem I get slow speeds with Transmission up to 800KB/s, normally I can get up to 1.5MB/s with the same good seeded torrents from my PC and Transmission also reports that the port is closed.

I'm going to attach the settings of what I have done so far.
Thanks in advance.

Please note:
In uTorrent I have UPnP and NAT-PMP port mapping enabled.
uTorrent also reports that the port is closed.
Also in Transmission UPnP doesn't work, it still reports that the port is closed.

{
    "alt-speed-down": 50, 
    "alt-speed-enabled": false, 
    "alt-speed-time-begin": 540, 
    "alt-speed-time-day": 127, 
    "alt-speed-time-enabled": false, 
    "alt-speed-time-end": 1020, 
    "alt-speed-up": 50, 
    "bind-address-ipv4": "0.0.0.0", 
    "bind-address-ipv6": "::", 
    "blocklist-enabled": true, 
    "blocklist-url": "http://www.example.com/blocklist", 
    "cache-size-mb": 4, 
    "dht-enabled": true, 
    "download-dir": "/tmp/harddisk/transmission/download", 
    "download-queue-enabled": true, 
    "download-queue-size": 5, 
    "encryption": 2, 
    "idle-seeding-limit": 1, 
    "idle-seeding-limit-enabled": false, 
    "incomplete-dir": "/usr/local/root/Downloads", 
    "incomplete-dir-enabled": false, 
    "lazy-bitfield-enabled": true, 
    "lpd-enabled": false, 
    "message-level": 2, 
    "open-file-limit": 64, 
    "peer-congestion-algorithm": "", 
    "peer-id-ttl-hours": 6, 
    "peer-limit-global": 500, 
    "peer-limit-per-torrent": 100, 
    "peer-port": 50126, 
    "peer-port-random-enabled": false, 
    "peer-port-random-high": 65535, 
    "peer-port-random-low": 1024, 
    "peer-port-random-on-start": false, 
    "peer-socket-tos": "default", 
    "pex-enabled": true, 
    "port-forwarding-enabled": true, 
    "preallocation": 1, 
    "prefetch-enabled": 1, 
    "proxy": "", 
    "proxy-auth-enabled": false, 
    "proxy-auth-password": "", 
    "proxy-auth-username": "", 
    "proxy-enabled": false, 
    "proxy-port": 80, 
    "proxy-type": 0, 
    "queue-stalled-enabled": true, 
    "queue-stalled-minutes": 30, 
    "ratio-limit": 0.0098, 
    "ratio-limit-enabled": true, 
    "rename-partial-files": true, 
    "rpc-authentication-required": false, 
    "rpc-bind-address": "0.0.0.0", 
    "rpc-enabled": true, 
    "rpc-password": "{6f7242c584183be3b79cf89bea7741f9c7f6c904gZwnn/Qb", 
    "rpc-port": 9091, 
    "rpc-url": "/transmission/", 
    "rpc-username": "", 
    "rpc-whitelist": "127.0.0.1,192.168.0.*", 
    "rpc-whitelist-enabled": true, 
    "scrape-paused-torrents-enabled": true, 
    "script-torrent-done-enabled": false, 
    "script-torrent-done-filename": "", 
    "seed-queue-enabled": false, 
    "seed-queue-size": 10, 
    "speed-limit-down": 500, 
    "speed-limit-down-enabled": false, 
    "speed-limit-up": 20, 
    "speed-limit-up-enabled": true, 
    "start-added-torrents": true, 
    "trash-original-torrent-files": false, 
    "umask": 18, 
    "upload-slots-per-torrent": 14, 
    "utp-enabled": true
}