Trusted Midlet and midelt Signing

Hi,
Am fairly new to this concept.. i have just finished developing an network based application and when I try to run it on a Sony Ericsson phone I keep getting a securityexception..
this can be avoided by making my midlte a trusted one.. for that I probably need to obtain a certificate from verisign or thwate... however i am not sure about the exact procedure..
i will probably get the certificate but then how do I use that to sign my midlet.. and what abt the key - value pair, or will that come with the certificate.. do i need to include this certificate as a part of my jar?
am sorry if i sound daft.. the thing is am clueless and i need some serious guidance from some of the gurus out there..
appreciate your help and patience..
thanks.

Hi there,
I finally managed to secure a Java Object Signing certificate from Verisign, however beyond that I have not been able to make any progress...
I followed the steps exactly as outlined in the Eclipse ME guide for midlet signing.. let me just recollect the exact steps..
1. Generate the keys. By using the keytool -keygen option
2. Generate the cert reg and send to verisign
3. After verisign sends the certificate, import it back into the key store..
4. Use the key store now to sign the jar and jad (2 steps here, one for computing checksum, 2nd for signing the jad)
After all this.. when i try and install this midlet on my nokia phone.. it refuses to install.. goes on to the last stage and says security error unable to install..
Tried installing it on a sony ericsson.. it refuses to recognize the jad file itself.. just throws an error saying download failed..
am so lost as to what could be going wrong..
maybe its worth a mention - when I tried importing the certificate into my keystore it threw this warning..
Certificate fingerprints:
MD5: << some numbers >>
SHA1: << some numbers >>
... is not trusted. Install reply anyway? [no]: yes
Certificate reply was installed in keystore
What could be going wrong.. the certificate? or am i missing a step? please help..

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