flex spatial resolution issue

[MouMezou]

I'm currently working on developing a flex app that shows flashing warnings on a map. initially the map service (that the flex app was calling ) were published using an arcGIS server 10, and the app was working fine at that stage, but for performance reason we tried to publish those same map service on arcGIs server 9.3, and currently when we replace the links of the service in the code the page is blank and we can see map service for the topo or the  flashing points, so i'm not sure if it's a spatial reference issue or some went wrong when we published the service on 9.3 the flex code for the

<esri:SpatialReference  id="mySpatRef" wkid="102100"/> 
   <esri:Extent  xmin="-7860000" ymin="5700000" xmax="-6920000" ymax="6050000" spatialReference="{mySpatRef}"/>

also the details for the rest topo service published on 9.3 are:

Intial Extent:

XMin: 2493157.30426767
YMin: 7335928.22365515
XMax: 2667782.65351836
YMax: 7451419.07963686
Spatial Reference: 2953

Full Extent:

XMin: -7760879.3498
YMin: 2452166.121145
XMax: 4715497.5148
YMax: 15343086.657155
Spatial Reference: 2953

the details for the rest topo service published on 10

Spatial Reference: 2953

Single Fused Map Cache: false

Intial Extent:

XMin: 2227605.42486088
YMin: 7269156.54693189
XMax: 2631831.26608102
YMax: 7729934.66520837
Spatial Reference: 2953

Full Extent:

XMin: 2115486.683773
YMin: 7197221.64307733
XMax: 2860290.25671348
YMax: 7817009.34098606
Spatial Reference: 2953

the details for the rest flashing points service published on 9.3
Spatial Reference: 2953

Single Fused Map Cache: false

Intial Extent:

XMin: 2152802.90586477
YMin: 7275350.76970667
XMax: 2946144.72632857
YMax: 7736452.68936889
Spatial Reference: 2953

Full Extent:

XMin: 2298027.977205
YMin: 7336492.655655
XMax: 2646835.418495
YMax: 7681074.624045
Spatial Reference: 2953


the details for the rest flashing points service published on 10
Spatial Reference: 2953

Single Fused Map Cache: false

Intial Extent:

XMin: 2262690.91484333
YMin: 7304115.57051111
XMax: 2749746.03823889
YMax: 7709418.10214667
Spatial Reference: 2953

Full Extent:

XMin: 2298027.977205
YMin: 7336492.655655
XMax: 2646835.418495
YMax: 7681074.624045
Spatial Reference: 2953

I will really appreciate some help with this issue, i've been looking around and tried few things but still getting the blank page although all other items  on the page are visible like my navigation  bar some calculation on the top that shows the number of flashing points, but not the topo map or the flashing points.

[MouMezou]

correcting the xmin,ymin,xmax,ymax, also changing the wkid fixed the issue