Penguin or something else?

[SamCUK]

Mid April my site www.musicliveuk.com lost almost all its rankings. I'm still non the wiser as to why and it seems a little earlier that the penguin update. I wonder if any of you guys could take a look and offer any suggestions as to what might have happened? I'm relatively new to SEO and have worked on my own site myself? If I've made some mistakes how do I fix it?

[Paul78]

Have you checked webmaster tools for any messages?

[SamCUK]

Yea no messages in there. Totally confused!