Can't Find My UDF

Sometimes the simplest things are the most difficult... I'm creating a
UDF as below, then executing it but all I get is that the object does not exist. I must be missing something very basic here...

CREATE function dbo.GetColumnLength(@vcTableName varchar(50), @vcColumnName varchar(50)) returns smallint
as
begin
declare @intLength as smallint
select @intLength=sysC.prec from syscolumns sysC, sysobjects sysO
where sysC.Id = sysO.Id AND sysO.xtype ='U' And
sysO.Name = @vcTableName AND
sysC.Name = @vcColumnName
return @intLength
End
GO
select top 2 * from player, dbo.GetColumnLength('playerdetails','email')