Order By Ignoring The Hyphen Character

Hi,
I'm using the following SQL script to return a list of part number and the order is not what I expect. Perhaps this is a collation problem but I have no idea where to look to modify that.

Thanks in advance, John
select part from transactions T where (T.transdate between '20070701' and '20070705') and
(T.transtype = 'ISSU' or T.transtype = 'RTRN') order by part


Here is the beginning of the Transactions table create script


CREATE TABLE [Transactions] (
[RecNo] [int] IDENTITY (1,1) NOT NULL,
[Part] [nvarchar] (30) NOT NULL ,
[TransDate] [nvarchar] (8) NOT NULL ,
[TransType] [nvarchar] (4) NOT NULL ,
[FromLoc] [nvarchar] (10) ,


The 'Part' column is an alphanumeric field. The problem I am having is that the
Order By seems to ignore the hyphen character '-' when the returned rows
are ordered by the Part (which can contain hyphens in any column).

Here is an example of what I get.

130909N9
130909N9
130909N9
1-480698-0 * These two should not be here
1-480699-0 *
15-423
164-07700
164-07700
164-07700
1683


I was expecting this ( and I get this in and older database ).

068-03000
068-03000
06A19956
074-03200
077-367-0
08DU08
1-480698-0 * These should be here eariler in the data
1-480699-0
100-364072
100-364072