Check point and Parameterization problem

[gohar2500]

Hello All ,
I am new to QTP and gone throught the QTP tutorial and at some point I am getting some errors in Check points and Parameterzation please find it down and let me know the correct steps if you know off

"The "creditCard" object was not found in the Object Repository.
Check the Object Repository to confirm that the object exists or to find the correct name for the object.

Line (5):

Code:

"Browser("Book a Flight: Mercury").Page("Book a Flight: Mercury").WebList("creditCard").Select DataTable("p_Item4", dtGlobalSheet)"

.

Tip: If the objects in your application have changed, the Maintenance Run Mode can
help you identify and update your steps and/or the objects in your repository.



The "8/9/2010" object was not found in the Object Repository.
Check the Object Repository to confirm that the object exists or to find the correct name for the object.

Line (2):

Code:

"departureDate=Browser("Select a Flight: Mercury").Page("Select a Flight: Mercury").WebElement("8/9/2010").GetROProperty("innertext")"

.

Tip: If the objects in your application have changed, the Maintenance Run Mode can
help you identify and update your steps and/or the objects in your repository.