01-30-2011 04:20 PM
Hi and Welcome to the Forums!
To erase any contiguous block of messages, starting with the oldest one, simply highlight one of the date separators, click the key, and select Delete Prior.
01-31-2011 12:44 AM
To highlight the messages: Find the block of messages that you want ot delete. Touch the first one while you simultaneously touch the last one in the block to highlight them all. Click the delete button at the bottom of the touchscreen.