Share This buttons

Ok, so the html block is giving me loads of trouble, its erasing my code inserts. I've tried it all, I've tried adding html tags, inserting <p> tags, everything. Anything I put up there from adsense (which I got working through html tags) and Share This buttons (which I can't get to work period) is giving me trouble. Whats the deal? And whats the fix? Thanks in advance.

I dont know why this is still not working via Page Blocks

but if you want to get this working please follow my step

Step 1: Go to  Cpanel  then >>  phpMyAdmin

Step 2: Your Dolphin database

Step 3: Look for sys_page_compose

Step 4: Look on the second page for the new block you create

Step 5: Add the addthis code on: the white block say Content text

Step 6: Click GO

Step 7: Clean all the files inside the cache, cache_plubic and tmp please dont delete or remove the .htaccess from the cache folder

Then go take a look of the addthis sharing