You only have the valet key how do you open your trunk you could just hit the trunk release button but after hitting the valet button it wont open please help this is for a 1998 xj8 l series?

The purpose of the "Valet Key" is to allow a parking attendant or any other person to operate the car, but not be able to access the trunk where presumably you would store your valuables. The tip of the Valet key is different from the Master Key. It is part of the security systems design. You can use the Valet key to have another master key cut. But as you are probably aware, most locksmiths lack the special machine or key blanks to help you. Jag dealers will charge you a fortune, check the internet I had mine cut by a shop in Australia and had them delivered in the US in 3 days for under $35