That can’t be right, as infinityfree.net subdomains are not offered and the site doesn’t work. Perhaps you meant http://pksbookmarks.infinityfreeapp.com/?
In any case:
It is generally recommended to use ftpupload.net first and then try those if that fails, but it shouldn’t matter here.
If you have entered the username exactly like this, this is likely the issue. There is an exclamation mark ! next to your username that shouldn’t be there. Use your username without it, so epiz_34090568.
If after doing that it still fails, you might need to check your credentials.