I have an arduino Mega 2560, and as soon as it gets power the tx LED lights up and will not go off. I try to upload a sketch and it stalls the program at "uploading" and doesn't download the program. Furthermore, as soon as I plug in my arduino the program freezes up, and I cannot click on any of the toolbar dropdown options at the top. I can only click 'verify' 'upload' 'save' etc. I can't open up serial monitor or any of the options. I have tried both versions 1.04 and 1.01. Any ideas what is going wrong?