Invalid Application error on install

Question

Hey all,
I'm writing a mobile application for a final year project at university, and am trying to install the app OTA. I keep getting an Invalid Application error though, on several phones (a SE K700, a Samsung D900 and a Nokia s60). I googled the error, but none of the issues/solutions I found online (mostly incorrect version numbers) applied to me.
The jad file is as follows:
MIDlet-1: WanderlustClient,,com.wanderlust.client.WanderlustClient
MIDlet-Jar-Size: 31952
MIDlet-Jar-URL: Wanderlust_Client.jar
MIDlet-Name: Wanderlust Client
MIDlet-Vendor: Wanderlust Technologies
MIDlet-Version: 1.0
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
The jar manifest is as follows:
Manifest-Version: 1.0
MicroEdition-Configuration: CLDC-1.0
MIDlet-Name: Wanderlust Client
MIDlet-Vendor: Wanderlust Technologies
MIDlet-1: WanderlustClient,,com.wanderlust.client.WanderlustClient
MIDlet-Version: 1.0
MicroEdition-Profile: MIDP-1.0
The application (or what's been done so far!) can be found online at http://www.nebhead.com/wanderlust/Wanderlust_Client.jad
Thanks in advance!
Ben

Answer 1

To add few more .
Generally the following contitue install errors in order of priority
1. Security and signing issues
2. Special permissions and JSR support
3. Issues in JAD file(there is a list of these)
4. COnfig issues in OTA server(this is the least possible) as most of the OTA servers will support.In case u running ur own OTA server, it can have issues.
Also same JAD/JAR combination can beahave differently on different device platform.