Question about serial ports

I can upload to my TinyDuino using codebender but when I try with the Arduino IDE I get a serial port error - not recognising any device attached to port. Any reason why this would be happening?

Some good info but not enough detail.

Copy and paste the specific error and use CODE TAGS to post it ( </> )

Does it need a board specific package installed first ?

It looks also like you need to install FTDI drivers.
They are in the IDE installation folder in a subfolder called DRIVERS.

Also according to the web site you have to be specific about the clock frequency of 8 Mhz when setting it in the IDE before programming.

I presume you read this page

Setting up boards is not always as plug and play as we would like them.