TS - RRD Graph incorrect

I am trying to graph the number of users on our Juniper SSL-VPN.

I am sending the value pairs as:   sslvpn : 227  ,etc.

 
I am having a problem with the graph definition:

[sslvpn]

                 TITLE Count of Juniper Users

                 YAXIS Users

                 DEF:in=sslvpn.rrd:sslvpn:AVERAGE

                AREA:in#00CC00:Number of Current Users

                 COMMENT:    Licensed for 600 users\n

                GPRINT:in:LAST:Cur\: %6.2lf %s

                GPRINT:in:MAX: Max\: %6.2lf %s

                GPRINT:in:MIN: Min\: %6.1lf %s

                GPRINT:in:AVERAGE:Avg\: %6.2lf %s\n

 
The Graph has a bad YAXIS.  

I need it to show the number of users and if possible a line in RED
showing 600 as this is the License limit.

 
I need assistance in getting the YAXIS values to be a number from
zero(0) on up.

Is it possible to also place a static line at the 600 value across the
graph?

 
Thanks,

 
Tom Schmitt

Senior IT Staff - R&D

L-3 Communication Systems West

640 North 2200 West

P.O. Box 16850

Salt Lake City, UT  XXXXX

Phone (XXX) XXX-XXXX

Cell      (XXX) XXX-XXXX

eFax    (XXX) XXX-XXXX

user-9c1ae820b621@xymon.invalid

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