Okapi Plugin not working with OmegaT 2.3.0

Roberto Alberdi wrote:
Please bear with me if I look too dumb (probably I am), but I am brand new to OmegaT and I am not able to make it work with .ts files. As I have just said, I need to translate some .ts files and I decided to give OmegaT a try, since I don't like QT Linguist at all due to its limited functionality. I have installed OmegaT 2.3.0 Update 3 (standard version) and my system has Java 1.6.0_23-b05 already installed.

I downloaded the latest stable Okapi Plugin for OmegaT (M14), unzipped the file, following the simple installation instructions I dropped its contents in the plugins folder of the OmegaT installation folder, and restarted everything.

Now comes the problem. I have created a new project and when I try to import the .ts files into it I get the following error message: "Java.Lang.IllegalArgumentException: Property org.codehaus.stax2.reportprologwhitespace is not supported." And that's it. I can't import the files into the project and I can't work with them.

There is a warning in the Okapi wiki: "Warning: Note that the plugin is currently not compatible with OmegaT 3.5. Work is being done to fix this." What do they mean with OmegaT 3.5? As far as I know, the latest OmegaT version is 2.5.0, dated Oct. 23 2011.

There is a Java Update 29 version available. Would installing this update solve the problem?

Should I install the Okapi Tools too?

As I said, I am not fond of installing unnecessary things in my working machine, so if I can live without the Okapi tools, let there be so.

Does anybody know what am I doing wrong?

I really need this app working with .ts files asap. Time is running against me and QT Linguist is anything but fast: No search and replace function in target t, no spellcheck, no consistency check, not even Ctrl+C to copy the source text...