Проблемы с FlagsAttribute Enum

So I'm building an MSNP (windows live messenger) client. And I've got this list of capabilities

public enum UserCapabilities : long
{
    None = 0,
    MobileOnline = 1 << 0,
    MSN8User = 1 << 1,
    RendersGif = 1 << 2,
    ....
    MsgrVersion7 = 1 << 30,
    MsgrVersion8 = 1 << 31,
    MsgrVersion9 = 1 << 32,
}

full list here http://paste.pocoo.org/show/383240/

The server sends each users capabilities to the client as a long integer, which I take and cast it to UserCapabilities

capabilities = Int64.Parse(e.Command.Args[3]);
user._capabilities = (UserCapabilities)capabilities;

This is fine, and with atleast one user (with a capability value of 1879474220), I can do

Debug.WriteLine(_msgr.GetUser(usr).Capabilities);

and this will output

RendersGif, RendersIsf, SupportsChunking, IsBot, SupportsSChannel, SupportsSipInvite, MsgrVersion5, MsgrVersion6, MsgrVersion7

But with another user, who has the capability value of (3055849760), when I do the same, I just get the same number outputted

3055849760

What I would like to be seeing is a list of capabilities, as it is with the other user.

I'm sure there is a very valid reason for this happening, but no matter how hard I try to phrase the question to Google, I am not finding an answer.

Please help me :)