You will need to add it straight to the sidebar template. This requires a little understanding of HTML editing. Follow the steps below. Login to Blogger.com.
1. From the Dashboard choose “Template”.
2. Looking at the HTML code of your sidebar, you will see a lot of <ul> and <li> tags. Each tag basically displays one of the items listing on the sidebar. You would want to create one like that for your MyBlogLog widget. So first, go grab your MyBlogLog widget code, enclose it with <li> and </li> tags, pick a spot and paste the code there.
3. Click the "Save Template Changes" button to save. That's all!