Unable to share files between guest and host

[johnny123]

Hello

I am a new user of VBox. My host is WinXp and guest is LUbuntu. VBox is version 4.2.16. I wish to share the files between the host and the guest. Also I wish to
copy some text in the host and paste it to gedit inside the LUbuntu. Few days ago, I read about in some forum that I need to install guest additions. I followed
some advice on that forum, but it didn't work out. I am now getting some errors while installing guest additions. I have attached the log file and some snapshots
of the settings. Please help. I have searched the forums before posting this and could not find sufficient information.

thanks
johny123

[noteirak]

Have you tried clicking on Force Unmount?

[johnny123]

I did. Nothing Happens....

[mpack]

This kind of problem is often caused by changing the VirtualBox software on the host, or replacing a virtual disk - or both - while the VM is suspended in a saved state. Make sure you discard any saved state attached to this VM.

[johnny123]

How do I do that mpack ?

[mpack]

Right click on the VM and choose "Discard saved state".