the answer to your question is no
I THINK you just need to learn how to play a death knight L

lol
that sounds kind of dickish however so let me elaborate, you have two types of resources at your disposal as a deathknight
RUNES which come back every 9 seconds
and
RUNIC POWER which is generated by using your rune abilities
your cast sequence hangs up because you have no runic power to frost strike at the time. Generally speaking you should be able to follow a simple cast sequence of icy touch, plague strike, blood strike, blood strike, obliterate, FROST STRIKE * 2. Simply repeat that sequence over and over and you'll be fine
unless one of your attacks fails to land. If it fails to land you wont get any runic power for it, and you'll run out too soon and end up out of runic powers
The way i macro stuff into my dks, isnt a macro at all, i manually controll the dps sequence, however i can offer you some advice and suggest that you put frost strike / deathcoil on a separate key that you can spam quickly to dump runic power when you have it. (ie every 15-20 seconds)
the key i use for my "runic power" dump ie the dumping of all my runic power at the end of my rune cast sequence, is caps lock for frost strike, and shift +capslock for death coil
The ONLY ability that will work in the cast sequence second line like you do on dispel is to /cast !rune strike, which toggles the ability on whenever it procs. This MIGHT still break the cast sequence, and its not an effective dps button.
if you're gonna do anything with a dk i suggest going to
www.elitistjerks.com website, find the deathknight forums and START READING !! EVERYTHING you can find there is useful info, and it will make you into a better player over all, reading how things are supposed to be played.
*********************************EDIT************* ******************
its important to understand why the dispel macro works and the frost strike macro doesnt.
Dispel wont do anything if there's nothing to dispel, the spell fails to cast and its not part of the global cooldown. Frost strike is however, and it also has the restriction of needing runic power to maintain the cast. your dispel would do the same thing on your priest if you had something dispellable and you had no mana.

hope this helps!
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