Should I change the investments in my portfolio?

First....you need to tell us what does your portfolio consist of.
Second...what are your objectives? (growth, income, principal protection)
Third...it is going to cost you more than $7 for portfolio advice,
unless you are looking for something simple like..."Yes, you should
change it!"

Another small problem lionfish failed to mention is that is illegal
for anyone to give "professional" investment advice until they have
dicussed various preferences and objectives of you investing strategy
with you.

If you are asking this question on a Google-Answers message board. 
The answer will undoubtably be yes.
Another thing, is that it is not illegal to give investment advice as
long as you specify that you are not a proffesional investment advisor
and that it is just your opinion.  Just like you can tell someone that
they need antibiotics as long as you don't pretend to be an actual
doctor.

Clearly you have not given us enough information. We need to know your
life situation: Will you be needing money from your investments soon?
Do you have the ability to generate an income on an ongoing basis? How
many years are you from retirement? Whether your investments are
appropriate really depends on whether they satisfy your financial
plan. So, you first question should be, do I need to draw up a
financial plan? The answer is YES.

The in-general answer to your question is NO. You should not just
change the investments you hold for no reason. Doing so will cost you
money. You will pay fees on every transaction, and if there is no good
reason for doing so, it's a dead loss. In general it is better to sit
on the investments you have and change the structure of your portfolio
by deciding what to do with new money that you add to it. Of course
you should rebalance from time to time, but you must have a financial
plan to tell you how and when.

Here is a link that further explains why, in general, you should NOT
change your investments:

<a href="http://www.efficientmarket.ca/article/Buy-And-Hold">Efficient
Market Canada -- Never Sell a Stock</a>