sql error

[regitbull]

Ey,

Im trying to input a valua into a table field.

I added 3 colums to the user table called type,points and dateline.
I want to make it edit the values of a user.

So lets say we have a user called testuser with userid1.

I want to make it write values into the fields of userid1.

I tried this code:

	$vbulletin->db->query_write("
		INSERT INTO
			".TABLE_PREFIX."user WHERE userid = ".$userid.",,
		SET
			type = 1,
			points = '".$points."',
			dateline = ".TIMENOW."          
	");

So what this code needs to do is first search the table user for userid1.
Then it will edit the fields of userid1 and add the values of the script.
When i run the script i get this error:
Error Number : 1064

Could you guys tell me whats wrong with this code and show the fix.
I tried to google it but could not find a solution.

I dont know much about sql im only editing a existing mod.

Thx for the help