RegEx-Spezieller Fall, prefix , content

Question

http://www1.minpic.de/bild_anzeigen.php?id=136638&key=3878661&ende

Input
 @30PY@ZN@K0@16K440@V051822@3SB00dfdgg000011@

RegExPattern <RegExprValid>@V[A-Z0-9]{2,10}@</RegExprValid>

Ziel:
  a) Prefix = V
  b) Inhalt = 051822
  zu bekommen.
 
 Was mache ich falsch?
 
 string input = txtInputHandheldscanner.Text;// txtScanfield.Text;
            Match match = Regex.Match(input, pattern);

            if (match.Success)
            {
                System.Diagnostics.Trace.WriteLine(string.Format("Prefix: {0}\r\nContent: {1}", match.Groups[1], match.Groups[2]));

                prefix = match.Groups[1].ToString();
                content = match.Groups[2].ToString();
                txtScanfield.Text = "";
                txtScanfield.Focus();
            }

Sieht jemand etwas?

Danke für Lösungen.

Grüße Andreas